While any number of topics would serve to compare and contrast Deleuze and Badiou, this article will focus on the event. Focusing on the event serves several purposes. First, it provides a vantage point from which to elucidate a number of key topics in both philosophers. Second, while Badiou’s most recent work is already organized around his conception of the event, Deleuze’s discussion of the event is more diffuse. Thus, a discussion of the event in Deleuze will serve as heuristic to relate several of Deleuze’s (Deleuze and Guattari’s) texts. Finally, focusing on a single issue will clarify what is at stake in each conception of the event.